ADC HAL

group nrf_adc_hal

Hardware access layer for managing the Analog-to-Digital Converter (ADC) peripheral.

Typedefs

typedef uint16_t nrf_adc_value_t

Analog-to-digital value type.

Enums

enum nrf_adc_int_mask_t

ADC interrupts.

Values:

enumerator NRF_ADC_INT_END_MASK

ADC interrupt on END event.

enum nrf_adc_config_resolution_t

Resolution of the analog-to-digital converter.

Values:

enumerator NRF_ADC_CONFIG_RES_8BIT

8-bit resolution.

enumerator NRF_ADC_CONFIG_RES_9BIT

9-bit resolution.

enumerator NRF_ADC_CONFIG_RES_10BIT

10-bit resolution.

enum nrf_adc_config_scaling_t

Scaling factor of the analog-to-digital conversion.

Values:

enumerator NRF_ADC_CONFIG_SCALING_INPUT_FULL_SCALE

Full scale input.

enumerator NRF_ADC_CONFIG_SCALING_INPUT_TWO_THIRDS

2/3 scale input.

enumerator NRF_ADC_CONFIG_SCALING_INPUT_ONE_THIRD

1/3 scale input.

enumerator NRF_ADC_CONFIG_SCALING_SUPPLY_TWO_THIRDS

2/3 of supply.

enumerator NRF_ADC_CONFIG_SCALING_SUPPLY_ONE_THIRD

1/3 of supply.

enum nrf_adc_config_extref_t

External reference selection of the analog-to-digital converter.

Values:

enumerator NRF_ADC_CONFIG_EXTREFSEL_NONE

Analog reference inputs disabled.

enumerator NRF_ADC_CONFIG_EXTREFSEL_AREF0

AREF0 as analog reference.

enumerator NRF_ADC_CONFIG_EXTREFSEL_AREF1

AREF1 as analog reference.

enum nrf_adc_config_reference_t

Reference selection of the analog-to-digital converter.

Values:

enumerator NRF_ADC_CONFIG_REF_VBG

1.2 V reference.

enumerator NRF_ADC_CONFIG_REF_SUPPLY_ONE_HALF

1/2 of power supply.

enumerator NRF_ADC_CONFIG_REF_SUPPLY_ONE_THIRD

1/3 of power supply.

enumerator NRF_ADC_CONFIG_REF_EXT

External reference. See nrf_adc_config_extref_t for further configuration.

enum nrf_adc_config_input_t

Input selection of the analog-to-digital converter.

Values:

enumerator NRF_ADC_CONFIG_INPUT_DISABLED

No input selected.

enumerator NRF_ADC_CONFIG_INPUT_0

Input 0.

enumerator NRF_ADC_CONFIG_INPUT_1

Input 1.

enumerator NRF_ADC_CONFIG_INPUT_2

Input 2.

enumerator NRF_ADC_CONFIG_INPUT_3

Input 3.

enumerator NRF_ADC_CONFIG_INPUT_4

Input 4.

enumerator NRF_ADC_CONFIG_INPUT_5

Input 5.

enumerator NRF_ADC_CONFIG_INPUT_6

Input 6.

enumerator NRF_ADC_CONFIG_INPUT_7

Input 7.

enum nrf_adc_task_t

Analog-to-digital converter tasks.

Values:

enumerator NRF_ADC_TASK_START

ADC start sampling task.

enumerator NRF_ADC_TASK_STOP

ADC stop sampling task.

enum nrf_adc_event_t

Analog-to-digital converter events.

Values:

enumerator NRF_ADC_EVENT_END

End of a conversion event.

Functions

NRF_STATIC_INLINE void nrf_adc_task_trigger(NRF_ADC_Type *p_reg, nrf_adc_task_t task)

Function for activating the specified ADC task.

Parameters

  • p_reg – [in] Pointer to the structure of registers of the peripheral.

  • task – [in] Task to be activated.

NRF_STATIC_INLINE uint32_t nrf_adc_task_address_get(NRF_ADC_Type const *p_reg, nrf_adc_task_t task)

Function for getting the address of an ADC task register.

Parameters

  • p_reg – [in] Pointer to the structure of registers of the peripheral.

  • task – [in] ADC task.

Returns

Address of the specified ADC task.

NRF_STATIC_INLINE bool nrf_adc_event_check(NRF_ADC_Type const *p_reg, nrf_adc_event_t event)

Function for retrieving the state of an ADC event.

Parameters

  • p_reg – [in] Pointer to the structure of registers of the peripheral.

  • event – [in] Event to be checked.

Return values

  • true – The event has been generated.

  • false – The event has not been generated.

NRF_STATIC_INLINE void nrf_adc_event_clear(NRF_ADC_Type *p_reg, nrf_adc_event_t event)

Function for clearing an ADC event.

Parameters

  • p_reg – [in] Pointer to the structure of registers of the peripheral.

  • event – [in] Event to clear.

NRF_STATIC_INLINE uint32_t nrf_adc_event_address_get(NRF_ADC_Type const *p_reg, nrf_adc_event_t event)

Function for getting the address of the specified ADC event register.

Parameters

  • p_reg – [in] Pointer to the structure of registers of the peripheral.

  • event – [in] ADC event.

Returns

Address of the specified ADC event.

NRF_STATIC_INLINE void nrf_adc_int_enable(NRF_ADC_Type *p_reg, uint32_t mask)

Function for enabling the specified interrupts.

Parameters

  • p_reg – [in] Pointer to the structure of registers of the peripheral.

  • mask – [in] Mask of interrupts to be enabled.

NRF_STATIC_INLINE void nrf_adc_int_disable(NRF_ADC_Type *p_reg, uint32_t mask)

Function for disabling the specified interrupts.

Parameters

  • p_reg – [in] Pointer to the structure of registers of the peripheral.

  • mask – [in] Mask of interrupts to be disabled.

NRF_STATIC_INLINE uint32_t nrf_adc_int_enable_check(NRF_ADC_Type const *p_reg, uint32_t mask)

Function for checking if the specified interrupts are enabled.

Parameters

  • p_reg – [in] Pointer to the structure of registers of the peripheral.

  • mask – [in] Mask of interrupts to be checked.

Returns

Mask of enabled interrupts.

NRF_STATIC_INLINE bool nrf_adc_busy_check(NRF_ADC_Type const *p_reg)

Function for checking whether the ADC is busy.

This function checks whether the ADC converter is busy with a conversion.

Parameters

  • p_reg – [in] Pointer to the structure of registers of the peripheral.

Return values

  • true – The ADC is busy.

  • false – The ADC is not busy.

NRF_STATIC_INLINE void nrf_adc_enable(NRF_ADC_Type *p_reg)

Function for enabling the ADC.

Parameters

  • p_reg – [in] Pointer to the structure of registers of the peripheral.

NRF_STATIC_INLINE void nrf_adc_disable(NRF_ADC_Type *p_reg)

Function for disabling the ADC.

Parameters

  • p_reg – [in] Pointer to the structure of registers of the peripheral.

NRF_STATIC_INLINE bool nrf_adc_enable_check(NRF_ADC_Type const *p_reg)

Function for checking if the ADC is enabled.

Parameters

  • p_reg – [in] Pointer to the structure of registers of the peripheral.

Return values

  • true – The ADC is enabled.

  • false – The ADC is not enabled.

NRF_STATIC_INLINE nrf_adc_value_t nrf_adc_result_get(NRF_ADC_Type const *p_reg)

Function for retrieving the ADC conversion result.

This function retrieves and returns the last analog-to-digital conversion result.

Parameters

  • p_reg – [in] Pointer to the structure of registers of the peripheral.

Returns

Last conversion result.

NRF_STATIC_INLINE void nrf_adc_init(NRF_ADC_Type *p_reg, nrf_adc_config_t const *p_config)

Function for initializing the ADC.

This function writes data to ADC’s CONFIG register. After the configuration, the ADC is in DISABLE state and must be enabled before using it.

Parameters

  • p_reg – [in] Pointer to the structure of registers of the peripheral.

  • p_config – [in] Configuration parameters.

struct nrf_adc_config_t
#include <nrf_adc.h>

Analog-to-digital converter configuration.

Public Members

nrf_adc_config_resolution_t resolution

ADC resolution.

nrf_adc_config_scaling_t scaling

ADC scaling factor.

nrf_adc_config_reference_t reference

ADC reference.

nrf_adc_config_input_t input

ADC input selection.

nrf_adc_config_extref_t extref

ADC external reference selection.